Tetrahedral-Atom 3-Ring Groupings in One-Dimensional Inorganic Chains: Be2AsO4OH-4H2O and Na2ZnPO4OH-7H2O

Abstract

The 'zeolitic' MXO4-based framework (M = Zn, Be, X = P, As) structure field has recently been shown to be a very extensive one by ourselves and others. A seemingly general feature of these new zeolitic (Zn/Be,P/As,O)- framework phases is a preference for a 1:1 M to X ratio and strict alternation of MO4 and XO4 tetrahedra, akin to a 'Lowenstein's rule' Al-O-Al avoidance and consequent Si/Al Tetrahedral alternation for 1:1 Si to Al ratio aluminosilicate phases. This feature would appear to militate against Zn/Be,P/As,O molecular sieves with odd- as opposed to even-membered ring systems, and also against phases whose M:X ratio is non-unity. We describe the preparations, structures and properties of two new phases; a zincophosphate, Na2ZnPO4OH(dot)7H2O (NaZnPO) , and a berylloarsenate, Be2AsO4OH(dot)4H2O (BeAsO), which are non-zeolitic, but contain 1-dimensional chains, whose building blocks include tetrahedral 3-rings.

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Document Details

Document Type
Technical Report
Publication Date
Feb 15, 1993
Accession Number
ADA262670

Entities

People

  • Galen D. Stucky
  • Thurman E. Gier
  • Tina M Nenoff
  • William T. Harrison

Organizations

  • University of California, Santa Barbara

Tags

Communities of Interest

  • Advanced Electronics
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Synthesis
  • Chemistry
  • Crystal Structure
  • Crystals
  • Materials
  • Military Research
  • Molecular Sieves
  • Molecules
  • Reflection
  • Resonance
  • Silicates
  • Single Crystals
  • Spectra
  • Surface Warfare
  • Three Dimensional
  • X Rays

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